3d printer

Abstract

A 3D printer has a base, a driving unit, a material exporting unit and a material tank. A three-dimensional prototype can be generated by the coordination of the material exporting unit and an X-axis rail, Y-axis rail and Z-axis rail of the base. The prototype can be a large item, and the driving unit and electrical control device can be used to control the melting and shooting-out of the plastic particles to increase the prototype's practicality, precision and completeness. Also, the costs of manufacturing the prototype can be significantly reduced.

What is claimed is: 
     
         1 . A 3D printer comprising:
 a base having a shaping space that has an X-axis rail on both sides thereof, a Y-axis rail disposed above the X-axis rails and the Y-axis rail moving linearly along the X-axis rails, a sliding unit disposed on the Y-axis rail and the sliding unit moving linearly along the Y-axis rail, the sliding unit having a Z-axis rail and a sliding block;   a driving unit having a frame located at the sliding block and the frame having a motor connecting with a decelerating mechanism that has a connecting portion at a bottom portion thereof, a positioning hole that is disposed at a bottom portion of the frame corresponding to the connecting portion;   a material exporting unit having a hollow heating tube a transportation rod and at least three heating pieces, wherein an opening is disposed at an upper portion of the heating tube and a material inlet hole is located at a sidewall thereof, and a protruding locking unit is corresponding to the positioning hole of the frame and a printing end is taperedly formed at the bottom portion of the heating tube, wherein the transportation rod is inserted into the heating tube and an upper portion of the transportation rod is protruding out from the opening to connect with the decelerating mechanism, and three heating pieces are disposed outside the heating tube; and   a material tank disposed on one side of the frame and a material inlet tube at a bottom portion of the material tank to connect with the material inlet hole.   
     
     
         2 . The 3D printer of  claim 1 , wherein an electrical control device is used to control the motor, decelerating mechanism and temperature of the heating pieces. 
     
     
         3 . The 3D printer of  claim 2 , wherein the temperature of the three heating pieces is adjustable to be low, medium and high from top to bottom. 
     
     
         4 . The 3D printer of  claim 1 , wherein the base has a computer to provide commands and parameters to control the base. 
     
     
         5 . A 3D printer comprising:
 a driving unit having a frame located at the sliding block and the frame having a motor connecting with a decelerating mechanism that has a connecting portion at a bottom portion thereof, a positioning hole that is disposed at a bottom portion of the frame corresponding to the connecting portion;   a material exporting unit having a hollow heating tube a transportation rod and at least three heating pieces, wherein an opening is disposed at an upper portion of the heating tube and a material inlet hole is located at a sidewall thereof, and a protruding locking unit is corresponding to the positioning hole of the frame and a printing end is taperedly formed at the bottom portion of the heating tube, wherein the transportation rod is inserted into the heating tube and an upper portion of the transportation rod is protruding out from the opening to connect with the decelerating mechanism, and three heating pieces are disposed outside the heating tube; and   a material tank disposed on one side of the frame and a material inlet tube at a bottom portion of the material tank to connect with the material inlet hole.   
     
     
         6 . The 3D printer of  claim 5 , wherein an electrical control device is used to control the motor, decelerating mechanism and temperature of the heating pieces. 
     
     
         7 . The 3D printer of  claim 6 , wherein the temperature of the three heating pieces is adjustable to be low, medium and high from top to bottom. 
     
     
         8 . The 3D printer of  claim 5 , further comprising a base having a shaping space that has an X-axis rail on both sides thereof, a Y-axis rail disposed above the X-axis rails and the Y-axis rail moving linearly along the X-axis rails, a sliding unit disposed on the Y-axis rail and the sliding unit moving linearly along the Y-axis rail, the sliding unit having a Z-axis rail and a sliding block. 
     
     
         9 . The 3D printer of  claim 8 , wherein the base has a computer to provide commands and parameters to control the base.